Resin pipe and pipe material

Abstract

In a resin pipe, PVDF being a fluororesin is softened by adding a perfluoromonomer thereto, so that the oxygen permeability can be significantly reduced. The oxygen permeability can also be reduced by providing a nylon tube as an outer layer.

1 . A resin pipe having an oxygen permeability coefficient of 5×10 6  (molecules·cm/cm 2 ·sec·Pa) or less and a flexural modulus of 1800 Mpa or less and containing a fluororesin. 
   
   
       2 . A resin pipe according to  claim 1 , wherein the oxygen permeability coefficient is 2×10 6  (molecules·cm/cm 2 ·sec·Pa) or less. 
   
   
       3 . A resin pipe according to  claim 1 , wherein the resin pipe is integrally formed of two or more kinds of materials having different compositions. 
   
   
       4 . A resin pipe according to  claim 2 , wherein the resin pipe comprises a layer of softened PVDF. 
   
   
       5 . A resin pipe according to  claim 1 , wherein the resin pipe comprises a nylon layer. 
   
   
       6 . A resin pipe according to  claim 3 , wherein the resin pipe is formed by combination of a layer of softened PVDF or nylon and a layer of one of ETFE, PTFE, PVDC, FEP, and PFA. 
   
   
       7 . A resin pipe according to  claim 1 , wherein an inner surface of the resin pipe is made of a material having resistance to one of an alkaline aqueous solution, an acidic aqueous solution, a neutral aqueous solution, and an organic solvent. 
   
   
       8 . A resin pipe having an oxygen permeability coefficient of 5×10 6  (molecules·cm/cm 2 ·sec·Pa) or less and a flexural modulus of 1800 Mpa or less and adapted to transport a chemical solution or ultrapure water. 
   
   
       9 . A resin pipe according to  claim 8 , wherein the oxygen permeability coefficient is 2×10 6  (molecules·cm/cm 2 ·sec·Pa) or less. 
   
   
       10 . A resin pipe according to  claim 8 , wherein the resin pipe is adapted to transport the chemical solution or the ultrapure water for use in manufacturing an electronic device or an electronic component. 
   
   
       11 . A resin pipe according to  claim 8 , wherein the resin pipe is formed by a layer of a single material or is integrally formed by layers of a plurality of materials having different compositions. 
   
   
       12 . A resin pipe according to  claim 11 , wherein said layer of the single material is a layer of softened PVDF or a nylon layer. 
   
   
       13 . A resin pipe according to  claim 11 , wherein the resin pipe is formed by combination of a layer of softened PVDF or nylon and a layer of one of ETFE, PTFE, PVDC, FEP, and PFA. 
   
   
       14 . A resin pipe according to  claim 8 , wherein an inner surface of the resin pipe is made of a material having resistance to one of an alkaline aqueous solution, an acidic aqueous solution, a neutral aqueous solution, and an organic solvent. 
   
   
       15 . A resin pipe having a multilayer structure, wherein the resin pipe comprises a layer of PFA and a layer of nylon arranged on an outer side of said PFA layer. 
   
   
       16 . A resin pipe according to  claim 15 , wherein said outer layer contains nylon 6. 
   
   
       17 . A resin pipe according to  claim 15 , wherein said outer layer is made of nylon 6 or a copolymer of the nylon 6 and nylon 12. 
   
   
       18 . A resin pipe according to  claim 15 , wherein said PFA layer is the innermost layer. 
   
   
       19 . A resin pipe according to  claim 15 , wherein said layer of nylon is the outermost layer.